Lenses are no marked BL because made before 1975, Bausch & Lomb started to mark lenses in second half of 70's Vintage Ray-Ban Metals aviator sunglasses are the iconic Bausch & Lomb aviators that have been a top choice of both the general public and celebrities for over 60 years, featuring gold plated frame and original Bausch & Lomb RB-2 lenses perfect for all light conditions. Originally designed for the US military, classic Ray-Ban aviators were designed with an extremely light frame weighing only about 150 grams of 24k gold-plated meta. The 58mm aviator lenses provide full coverage to the eye yet sit comfortably on the face, measuring approximately 2.25" x 1.875" at the widest points. The unisex Ray-Ban aviator frame measures approximately 5.25" temple to temple and is impressed B&L Ray-Ban USA on top of the nose bridge and impressed B&L Ray-Ban 58 [] 14 on the bottom of the bridge. See all photos for conditions and details frames and lenses have small signs of usage in particular see photos 10, 11 With generic or recycled case all my the pre owned sunglasses are cleaned and sanitized using ultrasounds machine